So far I'm the only Martial primary. I find that interesting.

Mine is as well.

*nods head*

I dislike the divine and (especially) the arcane archetypes. I'm surprised to see thier prevalence. Expert is best for skills in general. Martial has the ability to be a giant pig for combat talents. Expert doesn't have all the adaptations a spell casting archetype would have...but gets to attack at combat grade with physical attacks.

While what you say may be true, I personally hate the Expert Archetype. Yes, it allows for a lot of customization, but to me it is bland in the extreme. I think it is mostly an argument about a blank canvas to paint your masterpiece vs. a regulation sheet which you MUST make art on no matter if it is wrong for you. I'm more the later.

Expert is bland? I guess I can sorta see that if I get out of my usual head space.

But I don't really believe that. Expert means your skills work out. What skills do you want? Doesn't matter...they'll work out. That's cool and let's you focus on the talent side of your character. Which you're gonna need to a lot of the thinking about. Because the flip side of having the skills you want is that you're going to be fairly talent starved. You've just traded one set of restraints for another. More than the other archetypes (imo) the talents you get from your paths are Defining to your character.

I'm surprised there aren't more experts (and martial) PCs

Martial access to Advanced Armour Training and the LMT advancements are the biggest perks. For characters not using medium or heavy armours, Heirloom armour may be meeting the need for Expert archetypes.

Would be interesting from a dataset perspective. Next BI, during downtime, have a pop-survey of hands. "Who has an Expert? Keep your hands up if you have Exceptional armour..."

For Ss'kethis, I seriously looked at Martial rather than Expert just for the Advanced Armor Training. The huge benefit to AAT is that it can reduce the effective bulk of bulk 1 armor to 0 (exceptional reduces bulk by 1 to a minimum of 1 but there is no minimum for AAT). However, I knew I wanted to be decent at both fighting and casting and I just couldn't make it work as Martial.

Delbert was written as a Martial Divine Caster and was an absolute terror (and practically invulnerable with some cheese)

I will never EVER build a divine archtype character, any similar expert character will be more effective.

I will disagree that Divine is useless (or even ineffective) as Haakon is an utter terror on the battlefield, at least in the short term. That said, if you want a COMBAT divine, you have to go Illiir, Hurrian, or Nier with the rest losing out rapidly compared to what you can do with others. Hell, I've already seen at 2.5 with Haakon that he spends less time smacking things and more time in the background healing and buffing, but there is a niche for that too. What would make Divine far more powerful is more Devout Talents, or at least more broadly useful ones, as that is where I'm finding my own character is lacking.

I also admit that Experts the "multiclass" option for this system, but to be honest I have never seen an Expert who can do any one thing as well as the 'specialist' Archetypes.

I never said it was ineffective, I said I would never build one because Expert is better ( in general)